Different LED Pattern effect using 8051 microcontroller

Here are the 8 different types of codes made on LED controlled by 8-bit microcontroller. It is posted to enhance your programming skills on 8051 as basic skills are developed on LED interfacing with 8051 only.

Interfacing:

Try to make your own programs and different method to develop new ways to solve the problems which will enhance your skills more.

1. Blink LED

#include "REG52.h"
#define LED P0  //port defination
long int i;
void main()
{
while(1)                    // infinite loop
{
LED=0xff;   // shows 00000001
for(i=0;i<10000;i++);
LED=0x00;
for(i=0;i<10000;i++);
}
}

2. Alternative/ Dancing pattern

#include "REG52.h"
#define LED P0
long int i;
void main()
{
while(1)
{
LED=0xAA;
for(i=0;i<4500;i++);
LED=0x55;
for(i=0;i<4500;i++);
}
}

3. Curtain effect

#include "REG52.h"

int i,j;
long int k;
void d()              // delay function
{
for(k=0;k<3000;k++);
}
void main()
{
while(1)
{
P0=0x81;         //different values on LEDs
d();
P0=0xC3;        //different values on LEDs
d();
P0=0xE7;        //different values on LEDs
d();
P0=0xFF;        //different values on LEDs
d();
P0=0xE7;        //different values on LEDs
d();
P0=0xC3;        //different values on LEDs
d();
P0=0x81;        //different values on LEDs
d();
P0=0x00;        //different values on LEDs
d();
}
}

4. Counter on LEDs

#include "REG52.h"
#define LED P0
long int j;
int k,i;

void main()
{
while(1)
{
for(k=0;k<5;k++)
{
for(i=0X01;i<=0X80;i=i<<1)
{
LED=i;
for(i=0;i<50000;i++);
}
}
}
}